You can RP online in chat rooms, forums, and even in some online games.

People use the phrase “role-playing” in at least three distinct ways:

to refer to the playing of roles generally such as in a theatre, or educational setting;

to refer to a wide range of games including computer role-playing games, play-by-mail games and more;

or to refer specifically to role-playing games.

People who do the Renaissance Fairs are a very good example. You pretend to be a knight or blacksmith from 1227 AD, and every word and phrase you speak is from Old English (or think a Shakesperean play).

Dictionary.com definition: to assume the attitudes, actions, and discourse of (another), esp. in a make-believe situation in an effort to understand a differing point of view or social interaction